Preparation of coal-based graphene quantum dots/α-Fe2O3 nanocomposites and their lithium-ion storage properties

Zhang, Yating; Zhang, Kaibo; Jia, Kaili; Liu, Guoyang; Ren, Shaozhao; Li, Keke; Long, Xueying; Li, Meng; Qiu, Jieshan

doi:10.1016/j.fuel.2018.12.030

Cited by 71 publications

(35 citation statements)

References 26 publications

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“…Based on the above-mentioned examples, 0D carbon materials including nanoparticles and nanocages have been fabricated to effectively enhance the electrochemical performances, devoted to fast ionic transportation and high structural stability. However, compared with LIBs and SIBs, few studies about carbon dots (CDs) applied for anode materials of PIBs have been reported [ 112 – 120 ]. Therefore, it is necessary for further experiments to focus on novel structure for the family of 0D carbon anode materials, such as CDs, core–shell structure, and yolk shell structure.…”

Section: Zero-dimensional Nanomaterials For Pibsmentioning

confidence: 99%

Advanced Anode Materials of Potassium Ion Batteries: from Zero Dimension to Three Dimensions

et al. 2020

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Potassium ion batteries (PIBs) with the prominent advantages of sufficient reserves and economical cost are attractive candidates of new rechargeable batteries for large-grid electrochemical energy storage systems (EESs). However, there are still some obstacles like large size of K+ to commercial PIBs applications. Therefore, rational structural design based on appropriate materials is essential to obtain practical PIBs anode with K+ accommodated and fast diffused. Nanostructural design has been considered as one of the effective strategies to solve these issues owing to unique physicochemical properties. Accordingly, quite a few recent anode materials with different dimensions in PIBs have been reported, mainly involving in carbon materials, metal-based chalcogenides (MCs), metal-based oxides (MOs), and alloying materials. Among these anodes, nanostructural carbon materials with shorter ionic transfer path are beneficial for decreasing the resistances of transportation. Besides, MCs, MOs, and alloying materials with nanostructures can effectively alleviate their stress changes. Herein, these materials are classified into 0D, 1D, 2D, and 3D. Particularly, the relationship between different dimensional structures and the corresponding electrochemical performances has been outlined. Meanwhile, some strategies are proposed to deal with the current disadvantages. Hope that the readers are enlightened from this review to carry out further experiments better.

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Section: Zero-dimensional Nanomaterials For Pibsmentioning

confidence: 99%

Advanced Anode Materials of Potassium Ion Batteries: from Zero Dimension to Three Dimensions

et al. 2020

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“…For the initial charge curve, the voltage platform is located at 1.90 V . In Figure (d), the voltage platform at 1.38 V is the conversion reaction of Fe(PO 3 ) 2 /Fe 2 O 3 . The voltage platform at 1.83 V is attributed to the oxidation of Fe 0 to Fe 2+ and further oxidation to Fe 3+ .…”

Section: Resultsmentioning

confidence: 97%

“…For the initial charge curve, the voltage platform is located at 1.90 V. [43] In Figure 9(d), the voltage platform at 1.38 V is the conversion reaction of Fe (PO 3 ) 2 /Fe 2 O 3 . [44] The voltage platform at 1.83 V is attributed to the oxidation of Fe 0 to Fe 2 + and further oxidation to Fe 3 + . [45] In the first charge-discharge curve, the specific capacities of Fe 7 S 8 / C and Fe(PO 3 ) 2 /Fe 2 O 3 /C HNSs are 2260 and 2193 mA h g À 1 , respectively, while Fe 3 O 4 /C HNSs is 1863 mA h g À 1 (Figure S13 (b)).…”

Section: Electrochemical Performance Of Fe 7 S 8 /C Hnssmentioning

confidence: 99%

In Situ Derivatization for Boosted Lithium Storage Performance of Fe₇S₈/C Hollow Nanospheres

et al. 2019

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In this paper, Fe3O4 nanoparticles (Fe3O4 NPs) with an average diameter of 10 nm were grown in situ on the shell of hollow mesoporous carbon nanospheres (HMCNs) to form a new type of sesame balls‐like Fe3O4/C hollow nanospheres (HNSs) by thermal decomposition. After vulcanization and phosphating, Fe3O4/C HNSs are transformed into Fe7S8/C HNSs and Fe(PO3)2/Fe2O3/C HNSs, respectively. Compared with Fe3O4/C HNSs and Fe(PO3)2/Fe2O3/C HNSs, Fe7S8/C HNSs display good cycling stability as anode material for lithium ion batteries. When the current density is 1 A g−1, the reversible specific capacity of Fe7S8/C HNSs is 1006 mA h g−1 after 250 cycles. The rate performance and electrochemical properties of Fe7S8/C HNSs are significantly improved. Research shows that the capacitive behavior plays a major role in specific capacity contribution of Fe7S8/C HNSs electrode. The anchoring of Fe7S8 NPs on the shell of HMCNs avoids the aggregation of Fe7S8 NPs, promote the conductivity of composite and boost the delivery of electrons. This idea and expedient method of construction can be broadened to synthesize other hollow nanostructured material with preferable electrochemistry performance.

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“…reported the preparation of coal‐based GQDs/α‐Fe 2 O 3 nanocomposites with excellent cycling and rate capability by electrodeposition. [ 100 ] By adjusting the electrolytic solvent ratio (V DMF :V Water = 2:1), the antler‐shaped α‐Fe 2 O 3 nanoparticles were prepared on a nickel substrate, and then GQDs/α‐Fe 2 O 3 composites were fabricated by two‐step electrodeposition using GQDs solution as the electrolyte. The electrochemical test results demonstrated that the specific capacitance of GQDs/α‐Fe 2 O 3 composite could reach 1582.5 mAh g −1 at the current density of 1A g −1 .…”

Section: Applications Of Coal‐based Cdsmentioning

confidence: 99%

Coal based carbon dots: Recent advances in synthesis, properties, and applications

Liu

Zhang

et al. 2021

Nano Select

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Carbon dots are zero‐dimensional carbon nanomaterials with quantum confinement effects and edge effects, which have aroused great interests in many disciplines such as energy, chemistry, materials, and environmental applications. They can be prepared by chemical oxidation, electrochemical synthesis, hydrothermal preparation, arc discharge, microwave synthesis, template method, and many other methods. However, the raw materials' high cost, the complexity and environmental‐unfriendly fabrication process limit their large‐scale production and commercialization. Herein, we review the latest developments of coal‐based carbon dots about selecting coal‐derived energy resources (bituminous coal, anthracite, lignite, coal tar, coke, etc.) the developments of synthesis processes, surface modification, and doping of carbon dots. The coal‐based carbon dots exhibit the advantages of unique fluorescence, efficient catalysis, excellent water solubility, low toxicity, inexpensive, good biocompatibility, and other advantages, which hold the potentiality for a wide range of applications such as environmental pollutants sensing, catalyst preparation, chemical analysis, energy storage, and medical imaging technology. This review aims to provide a guidance of finding abundant and cost‐effective precursors, green, simple and sustainable production processes to prepare coal‐based carbon dots, and make further efforts to exploit the application of carbon dots in broader fields.

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Preparation of coal-based graphene quantum dots/α-Fe2O3 nanocomposites and their lithium-ion storage properties

Cited by 71 publications

References 26 publications

Advanced Anode Materials of Potassium Ion Batteries: from Zero Dimension to Three Dimensions

Advanced Anode Materials of Potassium Ion Batteries: from Zero Dimension to Three Dimensions

In Situ Derivatization for Boosted Lithium Storage Performance of Fe₇S₈/C Hollow Nanospheres

Coal based carbon dots: Recent advances in synthesis, properties, and applications

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Preparation of coal-based graphene quantum dots/α-Fe2O3 nanocomposites and their lithium-ion storage properties

Cited by 71 publications

References 26 publications

Advanced Anode Materials of Potassium Ion Batteries: from Zero Dimension to Three Dimensions

Advanced Anode Materials of Potassium Ion Batteries: from Zero Dimension to Three Dimensions

In Situ Derivatization for Boosted Lithium Storage Performance of Fe7S8/C Hollow Nanospheres

Coal based carbon dots: Recent advances in synthesis, properties, and applications

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In Situ Derivatization for Boosted Lithium Storage Performance of Fe₇S₈/C Hollow Nanospheres